package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.List;

@Service
@Slf4j
public class DIshServiceImpl implements DishService {
    @Resource
    private DishMapper dishMapper;
    @Resource
    private DishFlavorMapper dishFlavorMapper;
    @Resource
    private SetmealDishMapper setmealDishMapper;

    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
//        向菜品表插入1条数据

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);


//获取主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && !flavors.isEmpty()) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });

            //        向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
//        判断当前菜品是否能够删除--是否存在起售中的菜品？？
        ids.forEach(id -> {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
//                当前菜品在起售，不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
//        判断当前菜品是否能够删除 --是否被套餐关联了？？
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && !setmealIds.isEmpty()) {
//            当前菜品被关联不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
//        删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteById(id);
            //        删除菜品关联的口味
            dishFlavorMapper.deleteByDishId(id);
        }

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
//        根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
//        根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
//        将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dish, dishDTO);
//        修改菜品表基本信息
        dishMapper.update(dishDTO);
//        删除原有口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
//        重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && !flavors.isEmpty()) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });

            //        向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
}
